So, are you an internet addict? Do you sit before the comp for hours at end? Well, unless you are a blogger or a news junkie or working in a software firm, chances are that, most of than not, you get bored and keep wondering what other sites can you visit. Well, this is where StumbleUpon comes to your rescue. According to their official website,

Channel surf the internet with the StumbleUpon toolbar to find great websites, videos, photos and more based on your interests. StumbleUpon learns what you like and makes better recommendations.

So, what do you say? You can just install the extension onto your FireFox browser and keep stumbling onto new websites that you wouldn't have ever discovered, otherwise. I, personally, have been using this great tool for almost a year and I just love it. If you're interested, you can download the extension from this link.